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Description

In his catalogue of 1915, Philibert Jacques Melotte (1880-1961), a British astronomer of Belgian parentage, described object number 15 as being, ‘A very loose cluster. Somewhat similar to NGC 1027, but stars not so numerous and generally brighter’ [A catalogue of Star Clusters shown on Fraklin-Adams Chart Plates; Melotte, PJ, 12 March 1915].

Melotte 15 lies within the heart of the Heart Nebula (IC 1805), around 7,500 light years away in the constellation of Cassiopeia.

Data for Melotte 15 were gathered between 28 October and 17 November 2018 from a remote imaging rig in Spain that is owned and operated by Barry Wilson and me.

Comments

Author

Revisions

B

Bit better control of stars.

C

Forgot to crop off a black border. Also took opportunity of minor reworking of colour and contrast.

D

Rework from scratch.

F

Over the wekend the great Barry Wilson talked me through his 'tone mapping' technique, using this image as the basis for his tutorial. I was happy with the outcome, and thought I would post the result.

Sky plot

Histogram

In these public groups

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